president obama addressed the nation today. following the deadly explosions. he made it clear that information is still coming in. and that all the facts are not yet known. the president did make clear. those responsible will be identified and will be held accountable. >> i have directed the entire resources of the federal government to protect our people. in super and to insure and increase security around our major cities. the americans will say a prayer for the boston audience tonight. we still do not know who did this or why. we should not jump to conclusions until we have the facts. make no mistake that we will get to the bottom of this. >> pam: new at 11. a 12- year old bay area boy was hurt in the boston marathon blasts. the boy's father, alan hern -- is the varsity football coach of alhambra high school in martinez. and was in boston with his family. the boy's mother ran in the race. the family from martinez was close to the explosion. and coach hern's son was hit by some shrapnel. the alhambra high school principal released a statement. in part it say